Yes, sorry about not clarifying, this causes an exception and immediate shutdown of the application. I really can't look into it, but it seems to be something fairly simple... I mean, the Code Completion module is evidently parsing files very well and works. The problem occurs when you try to bring the symbols locally for a single file.
Maybe this helps: if I go back to Workspace Symbols view, and open a new file, the crash evidently doesn't occur. BUT, if I immediately switch to File Symbols, there is a strange lag in the browser, where nothing appears (not even categories, such as preprocessor, etc.)... and sometimes I have to click several times to force the symbols to appear. However, the application doesn't crash - it only does so when you switch files while the File Symbols browser is enabled.